fix #67

evpp/EventLoopThread.h

@@ -29,7 +29,7 @@ public:
         join();
     }
 
-    EventLoopPtr loop() {
+    const EventLoopPtr& loop() {
         return loop_;
     }
 

evpp/EventLoopThreadPool.h

@@ -62,7 +62,7 @@ public:
 
         for (int i = 0; i < thread_num_; ++i) {
             EventLoopThreadPtr loop_thread(new EventLoopThread);
-            EventLoopPtr loop = loop_thread->loop();
+            const EventLoopPtr& loop = loop_thread->loop();
             loop_thread->start(false,
                 [this, started_cnt, pre, &loop]() {
                     if (++(*started_cnt) == thread_num_) {

evpp/EventLoopThread_test.cpp

@@ -23,7 +23,7 @@ int main(int argc, char* argv[]) {
     printf("main tid=%ld\n", hv_gettid());
 
     EventLoopThread loop_thread;
-    EventLoopPtr loop = loop_thread.loop();
+    const EventLoopPtr& loop = loop_thread.loop();
 
     // runEvery 1s
     loop->setInterval(1000, std::bind(onTimer, std::placeholders::_1, 100));

evpp/TcpClient.h

@@ -53,7 +53,7 @@ public:
     virtual ~TcpClientTmpl() {
     }
 
-    EventLoopPtr loop() {
+    const EventLoopPtr& loop() {
         return loop_thread.loop();
     }
 

evpp/UdpClient.h

@@ -17,7 +17,7 @@ public:
     virtual ~UdpClient() {
     }
 
-    EventLoopPtr loop() {
+    const EventLoopPtr& loop() {
         return loop_thread.loop();
     }
 

evpp/UdpServer.h

@@ -17,7 +17,7 @@ public:
     virtual ~UdpServer() {
     }
 
-    EventLoopPtr loop() {
+    const EventLoopPtr& loop() {
         return loop_thread.loop();
     }